Analysis of a T-Test and Z-Test

Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, selecting the test statistic and determining its value from the sample data, comparing the observed value to the critical value obtained and determining whether to reject or fail to reject the null hypothesis.

In a separate paragraph, provide some information on when to use a t-test and when to use a z-test and why. Also, provide some information about why samples are used instead of populations.

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Solution Preview

Please see the attached files for the solution. A discussion on t-tests and z-tests is provided in the paragraph below.

In a separate paragraph, provide some information on when to use a t-test and when to use a z-test and why. Also, ...

Solution Summary

This solution contains a detailed explanation of testing a hypothesis on one variable's data by a t-test. Some information on when to use a t-test and when to use a z-test is provided as well. The hypothesis test computations and analysis are provided in two documents, in a Word file and in an Excel spreadsheet.